Printer&#39;s form.



F. G. LEETHEM. PRINTERS FORM.

APPLICATION FILED APR.5,1913.

1,129,579. Patented Feb. 23, 1915.

TVz'inees fave Z 4 fiziarz THE NORRIS PETERS 60., PHOTO-LITHU.. WASHING (0N. D. C

FRANK o. LEETHEM, or MIDDLETOWN, NEW YORK, ASSIGNOR 'ro LATHAM AUTOMATIC REGISTERING COMPANY. A CORPORATION OF ILLINOIS.

PRINTERS FORM.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application filed April 5, 1913. Serial N 0. 759,243.

. lowing is a clear, full, and exact description.

This invention relates to printers forms and particularly to an adjustable member which may operate as a hook or clamp or which may be used for other purposes in making up a printers form.

One of the principal objects of the invention is to provide an arrangement and construction of parts whereby a traveling part such as a plate-engaging-member may have a continuous movement within the form or at least a movement from one guiding member into the next or adjacent member, and at the same time to construct the parts so that the moving part or traveler is selflocking, that is it holds itself securely 1n any position into which it is advanced.

In carrying out the invention I prefer to provide the blocks or bases upon which the printing plates are supported in the form, with channels which may be placed end to end. These channels present continuous open slots on their upper sides and furthermore they are threaded internally so as to be engaged by a screw which may be rotated from above, and I construct the parts in such a way that this screw can pass uninterruptedly from one of these bases to the next.

Although in many instances special ali'ning means for the bases is not necessary, one of the objects of the invention is to provide additional means which may be used where desired to insure a perfectly accurate alinement of the channels.

The invention consists in the general combination of parts and simplicity of details hereinafter described, all of which contribute to produce an eflicient device for this purpose. A preferred embodiment of my invention will be particularly described in the following specification, while the broad scope of the invention will be pointed out in the appended claims.

In the drawings, Figure 1 is a plan illustrating the manner of employing my invention in practice; Fig. 2 is an end elevation of one of the devices and also illustrating the special alining means; and Fig. 3 is a longitudinal section through two, of the bases or guide members in which the traveler moves and illustrating how the traveler passes from one member to the other.

Referring more particularly to the parts, 1 represents a part of a printers form which may comprise a plurality of interchangeable bases 2 and guide blocks 4 upon which the printing plate 3 is supported. I prefer to give the guide blocks 4 a special .form and having a continuous open slot 5 passing from end to end and disposed over a channel 6 which passes completely through the base or block. Just within the slot 5 I prefer to provide guide grooves 7 which may be engaged by the sides of a traveler 8 which is adapted to travel or slide longitudinally in the slot. This traveler 8 preferably supports within the channel a rigid arbor 9 on which there is rotatably mounted a screw 10. The thread of this screw 10 engages threads 11 which are formed in theunderside of the channel. On the upper side of the traveler I may provide a hook or plate engaging member 12 having a pin socket 18 or other means for rotating a bevel-gear 14, said bevel-gear meshing with a second bevel-gear 15 which is rigid with the screw 10. By means of a pin wrench, the socket l3 may be rotated so as to rotate the screw 10. As the screw rotates, it. moves along in the threads 11 and advances the traveler.

In using the device I place several of the blocks or uide members 4 so that the channels 6 are disposed end to end and in alinement in such a way that a continuous channel and a continuous open slot are formed extending within the form, but not extending across the. form. I form the threads 11 in the bases so that the thread passes into and out of the adjacent faces at the same point, that is, in the vertical central plane which passes through the axis of the guide block. the blocks are interchangeable, and when the blocks are placed end to end, the threads of one block register exactly, that is, the pitch line of one thread registers with and forms a continuation of the pitch line of the threads of the next block, and hence a continuous helical pitch line for the thread is formed permitting the screw 10 to pass uninterruptedly from one block into the next.

In this way the ends of 'Instead of a plate engaging member 12 obviously the traveler 8 may carry a point or a slitter for markingproofsheets.

.rother words, the. plate can be lockedinplace a .and will remain'locked.

/Vhere it is. desired to insure perfect alinement :of 1th?) channels v6 and although in many cases itwould be unnecessary to provide special means. for insuring such! an alinement, 1- may provide 'means fornnsuring perfect alinement consisting of side rules 16wvhich mayv be laid on one or both sides of the blocks 'whichare alined endto end :and the inner .faces .of these rules 16 -:-may :havepins l6 'received in longitudinal grooves 17 formed in the outer sides ofthe blocks. These bases and blocks. are all out r :to standard sizes. so. that, they. can. be: readily al-ined as suggested. When: these side rules the invention which 1 have described above are used theguide blocks are narrower so that. taken with the side rules. they measure J the same width as-one of the bases 2.

The channel formed by the blocks 4: does not passanyconsiderable distance under the plate 3 but only under the edgesand hence the plate is wellsupported in printing. 35

Inorderto make. the guide blocks reversible, it is advisable that the pitch line at the end of each block should emerge onto the .1 "end of the block inthe'central longitudlnal plane of the block andiat the same height on the block.

It; isunderstood that the embodiment of is only :one of the manytforms or embodi- .ments the invention may; take, and 1 do not -wish to be limited in the practice of the invention, nor in: my claims. to the. particular embodiment described above.

that 1 claim is 1. 1n printers; hooks in combination, two

.members having channels passing -,com- .pletely therethroughand disposed adjacent withsaid channels in alinement, said channels having-internal threads, the pitch line 1 of the threads of one of saidchannels being :arranged to register w1thv and iorm a continuation ofthe pitch line of. the threads of the other channel soas to form an unin- 1 terrupted continuous-thread from one chaneberi-zmoving with said moving part and radapted tobe advancedby said moving part when said moving part rotates.

2. 1n printers hooks in combination, two members having channels passing completely therethrough and disposed adjacent -with said channelsinalinement, said channels having internal threads, the pitch line of the threads of one of said channels being arranged to register with and form a continuation of the pitch line of the threads of the otherchannel so as to form an uninterrupted continuous thread from one channel to the other, a moving part traveling in said channels engaging said threads and adapted .to:.pass from one ofsaid members into the other, a plate. engaging membermovingwith said moving partqand adaptedto be advanced bysaid moving part. when said mov- ;ing partrotates, and means for. rotating said moving. part from. a point. above. said mem- .bers.

V8. 1111 printers hooks. in. combination, two .zmembers having channels passingcompletely therethrough and disposed adjacent with saidchannels inalinement, said channels, having internal. threads, the threads of :one of said channels. being arranged to registerwith the threadsof the. other channel so as toforman uninterruptedv continuous thread fromonechannel .tothe other, a screw travelingiinsaid channels engaging saidpthreads and adapted to; pass from one ofsaid members intotheother a part imovring w-ithisaidscreweand adapted to be advanced by said screw when; saidscrewwrotates, vand means for engaging said-members to maintain said channels. in alinement.

4. 1n. printers hooksin. combination, two members ..having channels .wpassing completely therethrouglr-and; aCllSPOSBCl; adjacent with said channels. in .alinement, said channels lhavinguinternal; threads, the threads of one of said channels being arranged, to registerwith thethreads of the otherchannel so. asto ,ztorm an uninterrupted continuous thread from one channel .to the other, a screw traveling in said channels engaging said threadsandadapted. tolpassfromv one ofsaid members intothewothena plate engaging part i moving with, said 1 screw and adapted to .beadvanced'byvsaid screw when said screw; rotates,=;and a; rule; extending longitudinally of saidnmembers at the :side thereofand; engaging thesame to aline said channels.

5. In. combination, a block ihavinga channel extending completely, therethrough and having a continuous open slot extending completely therethrough above said channel, a traveler mountedto slideain said slot,: an ,arbor rigidly mounteduinsaid traveler, a screw to rotateloosely ,on said. arbor and having a bevel-gear rigid therewith, said channel having internal threads extending completely through. said member and engagiing .said screw,.a socket rotatablymounted in gear wheel rigid with said socket and engaging said first bevel-gear to rotate said screw.

6. In printers hooks in combination, two members having channels passing completely therethrough and disposed adjacent with said channels in alinement, said channels having internal threads, the threads of one of said channels being arranged to register with the threads of the other channel so as to have an uninterrupted continuous helical pitch line from one channel to the other, a screw traveling in said channels engaging said threads and adapted to pass from one of said members into the other, a member connected with said screw and adapted to be advanced by said screw when said screw rotates.

7. A printers hook comprising in combination, a block, having internal threads passing continuously therethrough, a screw rotatably mounted in said thread, a traveler rotatably carrying said screw and gears mounted on said traveler meshing together and held in working position by their own bearings.

Signed at New York city, N. Y., this 3' day of April, 1913.

FRANK C. LEETHEM.

Witnesses:

F. D. AMMEN, BEATRICE MIRVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington. D. G. 

